JPS6234401B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention consists of a plurality of sheet metal grids, each grid consisting of sheet metal strips bent in a substantially zigzag manner and inclined with respect to the plane of the grid; The present invention relates to a packing for a mass exchange column, which is integrally connected to form a planar intersection of a lattice therein, and a method for manufacturing the same.

Systemically constructed packings of this type are used for rectification and absorption and serve for mass exchange between the liquid phase and the gas phase (or vapor phase), and at the same time they also carry out heat exchange. It is done. The purpose of the packing is, inter alia, to distribute the liquid so that as large a liquid surface as possible is obtained for mass and heat exchange.

A filling of the type mentioned at the outset is known from DE 2005 295 A1. This known packing consists of a plurality of pairs of laminated grids arranged intersecting each other or in irregular positions. Each of the pair of laminar grids consists of a generally zigzag curved sheet metal strip;
These sheet metal strips join together at their bends and form there the plane intersections of the grid.

The three-dimensional configuration of such a known thin plate lattice is the first
It is clear from the figure, which is an enlarged perspective view of the lattice network. The illustrated lattice network consists of two zigzag-like successive laminae 1, 2 of a sheet metal strip 3, two zigzag-like successive laminae 4 of an adjacent sheet metal strip 6,
5. The bends 7, 8 connecting the lamellas 1, 4 and 2, 5 form plane intersections of the grid. Plane A as a lattice plane
is written, and the centers 9, 10 of the plane intersection points 7, 8 of the grid are located within this plane. Flakes 1, 2, 4, 5, like all other flakes,
It is inclined at an angle α with respect to the lattice plane A, with a portion of each flake located above the lattice plane A and a portion below the lattice plane A. The two sections of the sheet grating parallel to the grating plane A are designated A' and A''.
The strip width of the sheet metal strip 3 is designated s, the thickness is designated t, and the larger diagonal of the approximately diamond-shaped grid network is designated u. The angle that adjacent zigzag-shaped sheet metal strips 3, 6 make with respect to each other at the points of intersection 7, 8, ie the smaller angle of the rhombus of the lattice network, is designated by β.

The known sheet metal grid is manufactured in an expanded metal manner, ie the strip is cut into parallel strips that are connected at several points, so that the section lines connecting adjacent strips have the same length. It is held and offset with respect to the adjacent cutting line portion by half this length. By pulling these strips apart, the above-mentioned sheet metal grid is obtained.

A sheet lattice of fillings of the type mentioned at the outset is produced in principle in the same way as expanded metal, but this sheet lattice is characterized in that the width s of the lamina is much larger than its thickness t, whereas the usual Expanded metal differs from expanded metal in that the width of the lattice sides almost matches its thickness.

The fillings mentioned at the outset have the advantage that large filling surfaces can be easily obtained with low material costs. This advantage results from the laminar structure of the grid, ie because the laminae are thin plates with a large surface area compared to the material cost.

The advantages of large packing surfaces can only be used for mass exchange in the following cases: That is,
On the one hand, it ensures that the liquid is evenly distributed over the entire packing surface and that all the lamellar strips of the packing are completely wetted, and on the other hand that the gas (or vapor) rising in the column The pressure loss experienced when passing through the material is as low as possible, the entire gas flow flows with a uniform distribution over the liquid at right angles to the flow direction, and a partial flow of the gas passes through the filling without contact with the liquid. It can only be used if it is made so that it cannot flow.

For lateral distribution of the liquid, it is necessary that the packing itself, by its structure, distributes the liquid at right angles to the flow direction. That is, it is practically impossible to supply liquid in a uniformly distributed manner over the cross-section of the packing. Even if this can be done at great expense, it is still not enough. This is because the liquid may recombine inside the filling to form a rivulet if the structure of the filling cannot avoid such rivulet formation with a permanent lateral distribution of the liquid. . Furthermore, the liquid distribution is arranged to take place without the aid of a gas flow. This is because if this were not the case, undesirable effects due to gas loading would occur. Furthermore, for optimal mass exchange, it must be ensured that the liquid surface is constantly renewed, ie the liquid film flowing over the packing surface has as high a degree of turbulence as possible.

The results of the experiments that form the basis of the present invention are as follows. That is, if the thin plate strips of the known thin plate grid are arranged at right angles to the flow direction, the pressure drop experienced by the gas rising in the column as it passes through the packing is such that the thin plate grids are connected to each other without large gaps. Very large when placed side by side. Apparently for this reason, in the packing known from DE 2005 295 A1, the laminar grids are not arranged regularly adjacent to each other, but are arranged in pairs at irregular positions at right angles to one another. It is set in. This means, on the one hand, that the specific surface area of the filling is small (filling surface area per filling volume).
On the other hand, it has the disadvantage that a significant portion of the gas flows through the gaps between the grid pairs instead of over the liquid. Furthermore, if the lamellar strips are arranged at right angles to the flow direction, a significant portion of the liquid will drip off the lamellas, especially from the ends of the lamellar strips;
It remains unused for material exchange. The above-mentioned disadvantages are avoided if the lamella strips are arranged in the flow direction, but then the liquid flows downwards along the zigzag-like lamella strips and covers the entire surface of the lamina. Neither the lateral distribution of liquid necessary for complete and uniform wetting nor the turbulence necessary for liquid mixing and surface renewal is obtained.

The problem of the present invention is to uniformly distribute the liquid phase at right angles to the flow direction, generate a high degree of turbulence in the liquid phase, and reduce the pressure loss of the gas or vapor flow when the specific surface area of the filling is large. The object of the present invention is to provide a filling of the type mentioned at the outset which can be produced simply and inexpensively, with as little as possible.

In order to solve this problem, according to the present invention, the thin plate strips extending in the flow direction have a flow guide section at the intersection point, and the flow guide section changes the flow direction of the liquid phase flowing down on the thin plate strips. A portion of the liquid phase is then deflected through the intersection to the adjacent sheet metal strip.
The flow guides are formed by edges of recesses provided in the outer region of the sheet metal strip on both sides of each crossing point or by elevations or depressions provided in the sheet metal strip on both sides of each crossing point.

Due to the inventive sheet metal strips extending in the direction of flow, pressure losses in the gas or steam flow can thus be reduced even at high packing densities. In addition, guides at the intersections deflect part of the liquid phase flowing down on the thin plate strips to the adjacent thin plate strips, resulting in a uniform distribution of the liquid phase in the direction perpendicular to the flow direction and High turbulence in the membrane is obtained, resulting in optimal mass exchange. This turbulence is caused by the fact that parts of the liquid phase flowing down on adjacent sheet metal strips are deflected by the guides at the crossing points and cross each other.

Embodiments of the invention will be described in detail below with reference to the drawings.

The packings described in detail below all consist of a plurality of laminated grids stacked directly on top of each other.

The sheet metal grids of the packings 11 and 12 shown in FIGS. 2, 3 and 4 and 5 are all constructed identically and consist of approximately zigzag-shaped sheet metal strips 13 to 17, which The sheet metal strips are joined together at the bending points 18 and form there the plane intersections of the grid. Adjacent zigzag-shaped sheet metal strips 13 to 17 of each grid have triangular cutouts 20, 21 (FIGS. 2 and 6) in their outer edges on both sides of each intersection point 18.
), so that the portion of the lamina adjacent to the intersection tapers toward the intersection.
The recesses 20, 21 are longer than the width s of the sheet metal strip in the zigzag direction of the sheet metal strip and deeper than half the strip width s in the direction perpendicular to this sheet metal strip. In Figure 2, notch 3
The length and depth of the cutout corresponding to the base and height of the square are designated g and h, respectively.
Since the depth h of the cutout is greater than half the width s, the width k of the intersection plane at its narrowest point is less than the width s of the sheet metal strip.

As shown for example in FIGS. 2, 3 and 4, 5, the sheet metal grids can be stacked one on top of the other in an orderly manner in another way, with fillings having different degrees of filling depending on the stacking method. In other words, fillers with different specific surface areas can be obtained. In FIGS. 2, 3 and 4 and 5, the first lattice lamina is designated a, the second lattice lamina b, and so on. The lattice planes are indicated by letters A, B, etc.

In both packings 11 and 12, the flakes of the first, third, fifth, etc. gratings a, c, ... are inclined in the same direction to the grating plane, and the second, fourth, sixth, etc. gratings b , d, f, ... are tilted in the opposite direction toward the lattice plane. This can be done precisely by rotating the second, fourth, etc. grids by 180° relative to the first, third, etc. in the grid plane, respectively, when stacking the grids to form the packing 11 or 12. This is realized using identically constructed grids.

In the filling 11, the centers of the intersections of the first, third, fifth, etc. lattices a, c, e, ... are located on a common line perpendicular to the lattice plane, and the second,
The center of the intersection of the fourth, sixth, etc. lattices b, d, f, ... is the center of the intersection of the first, third, fifth, etc. lattices a, c, etc.
e, ... extending through the center of the mesh and located on a common line perpendicular to the lattice plane. Very dense packings, ie packings with a very high specific surface area, are thereby obtained. In this case, the division plane of each grating parallel to the grating plane coincides with the grating plane of both adjacent gratings, so that the total thickness of each of the three successive gratings is twice the thickness of the individual grating. Only equivalent.

In the packing 12, all the lattices a, b,
The center of the intersection of c, .

The filling consists of zigzag bent thin plate strips 1
3 to 17 are inserted into the column in such a way that they extend in the axial direction of the column, ie in the direction in which liquid or gas is fed to the packing. In FIGS. 2 and 4, the direction of liquid flow is indicated by arrow 22, and the direction of gas flow is indicated by arrow 22'. The liquid supplied flows downwardly over the sheet metal strips 13 to 17, as indicated by the arrow 23 in FIG. As shown in FIG.
Due to the tapered lamina shape, the liquid 23 flowing down through the top into one of the intersection points 18 flows across the intersection 18 and into the adjacent laminate strip 16.
be guided in a flowing manner. This results in an optimal lateral distribution of the liquid, with the adjoining sheet metal strips 16 conducting the liquid (not shown), and optimal mixing and surface renewal of the two liquid streams at the point of intersection. Immediately after passing the intersection, a portion of the liquid flows from the upper lamella surface around the edge 24 defining the notch 20 toward the lower lamina surface, as shown in FIG. This results in a very large and constantly renewed liquid surface for mass exchange, since the liquid flows over both lamina sides and the liquid flowing down on both lamina sides is always remixed at the point of intersection. This is guaranteed.

On the one hand, the narrowing of the sheet metal strips 13 to 17 at the intersection point 18 caused by the recesses 20, 21 results in an optimal lateral distribution of the liquid in the individual sheet metal grids, and on the other hand, all the sheet metal grids of the filling are connected directly to one another. Stacking provides a slight but certain lateral distribution of liquid between the individual grids and thus perpendicular to the plane of the grid and interaction between the liquid streams of adjacent grids. . In this case, a certain degree of turbulence also occurs, especially in the packing 11. This is because arrow 23 in Figure 2
This is because the liquid streams represented by are directed toward mutually contacting laminae of adjacent grids at an angle to each other.

The packings 11, 12 provide turbulent flow and good lateral distribution in the gas or vapor phase. This is particularly because the lamina of adjacent lattices are inclined with respect to each other and in the filling 11 the lamina furthermore protrude into the mesh of the adjacent lattice.

Packing 11 has proven to be particularly advantageous for customary applications in rectification and absorption, in particular because it has a very high specific surface area and nevertheless causes only low pressure losses in the gas phase. On the other hand, the filling 12 is more suitable for special applications in which it is necessary to work under extremely low pressures.

In this regard, the above-mentioned lateral distribution of the liquid takes place within the laminate grid and between the laminate grids independently of the gas flow, so that this lateral distribution is always optimally ensured even with only a small gas flow. I have to point that out.

The manufacturing of the fillers 11 and 12 is shown in FIGS. 7 to 10.
This will be explained below using figures. The thin plate lattice 27 shown in FIG. 7, which corresponds to the lattice of the fillings 11, 12, is obtained from the metal strip 28 shown in FIG. 8 in the following manner. That is, the thin strip 28 is cut into a plurality of parallel strips 30 which are each connected at a plurality of points 29 and which are adjacent to each other.
A cutting line portion 31 connecting the two at point 29
have the same length and are cut so as to be offset from the adjacent cutting line portion 31 by half of this length. In this case, the strip width s is selected to be greater than the thickness t of the strip 28, preferably such that the strip width s is 20 to 30 times the strip thickness 6. At the center of each cutting line section 31 a diamond-shaped hole 32 is punched into both adjacent strips 30 .
In this case, the length of both diagonals of the diamond-shaped hole is selected to be greater than the strip width s, and the length g of the notches 20, 21 is
and the depth h are chosen such that the above-mentioned advantageous dimensions are obtained in the separated state of the grating. The strips 30 are then pulled apart in the direction of the arrow 33 until the angle .beta. between adjacent strips 30 at the point 29 where they join is preferably at least 45 DEG and at most 90 DEG. After pulling the strips 30 apart, a laminate lattice 27 with zigzag-extending lamella strips results, the lamina of these lamella strips being inclined with respect to the lattice plane. The angle of inclination α, which is related to the extent to which the strips 30 are pulled apart, can be increased or decreased by subsequent processing steps. The angle of inclination α is preferably selected in the range of 25° to 75°. Thin plate lattice 27 thus obtained
are then stacked one on top of the other and connected to one another, for example simply fixedly connected via wires or welded to one another.

As shown in FIG. 10, the packing can be adapted to a circular column cross-section, i.e. grids with increasing and decreasing number of thin plate strips and therefore increasing and decreasing width are stacked. The cross section of the packing 34 gradually changes to a circular column cross section 35.
It has a shape that matches. Both of the narrowest gratings in the packing 34 are indicated at 36, and one of the 14 widest gratings in total is indicated at 37. Importantly, the grid can only be fitted stepwise to the tower cross section by adding or omitting one sheet strip at a time, and that both outermost zigzag sheet strips of each grid This means that there is no interruption in order to accurately match the By that,
Liquid flowing down on both outermost lamella strips does not drip or flow down the entire length of the strips, but instead flows across the point of intersection to the adjacent lamella strip, as described above. , and therefore flows back into the filling. Due to this stepwise adaptation of the packing to the column cross-section, it is unavoidable that voids occur between the packing edge and the column wall. If the diameter of the column is large, this void can be ignored and can be further closed, for example by a notched fabric strip wrapped around the packing, thereby also avoiding undesired gas flow along the column wall. Ru.

As shown schematically in FIG. 9, a plurality of packings are inserted one above the other into a rectification or absorption column with the laminar grid parallel to the column axis. The grids of adjacent fillings are arranged approximately at right angles to each other, ie the fillings are each rotated by 90 DEG relative to the previous filling during insertion. A very homogeneous lateral distribution of the liquid flowing through the column in the direction of the arrow 22 and of the gas flowing in the direction of the arrow 22' is thereby obtained, with respect to the lateral distribution of the phase in the laminar lattice of the packing and the lattice planes. The difference with the lateral distribution of the phase in the orthogonal direction cancels out.

As mentioned above, the thin plate lattice is filled with fillers 11, 12.
They can also be stacked on top of each other in different ways. For example, all grating lamellas can be tilted in the same direction towards the grating plane. In this case, like the grid of the filling 11, the grids can be offset with respect to each other, ie the centers of the points of intersection of the even grids lie on a common line extending through the centers of the meshes of the odd grids. can. In this case, a packing density between the packing densities of the packings 11 and 12 is obtained. However, the grids can also be offset with respect to each other in other ways, for example by shifting the centers of the intersections of the grids with respect to each other so that the cutting lines cutting through the plane intersections of the grids whose horizontal cut planes are stacked on top of each other are in line with each other. You can also. In that case, the packing density matches that of the filling material 12. Furthermore, by appropriately shifting the lattice with thin plate strips inclined in the same direction to the lattice plane,
A packing as dense as in the case of packing 11 is obtained. In this case, as in the case of the filling 11,
The partition plane of each lattice parallel to the lattice plane matches the lattice planes of both adjacent lattices.

The sheet metal strips can also be configured in other ways in order to direct the liquid through the intersection points. In the variant shown in FIG. 11, triangular ears 38 are bent out of the sheet metal strips on both sides of each crossing point for this purpose. In order to direct the liquid through the intersection point, the sheet metal strips can additionally have ridges or depressions at the intersection point, for example corrugated grooves or slots, which grooves can be moved from one side to the other depending on the desired course of the liquid flow. It extends from one lamination of the sheet metal strips through the intersection point to the next lamination of the adjacent sheet metal strip. Furthermore, the outer edge of the sheet metal strip can also have a recess formed in another way, for example semicircular.

In order to further reduce pressure losses in the gas phase and increase turbulence in the liquid phase, the flakes may additionally have holes 39 or lateral notches 39', as shown in FIGS. 12 and 13. You can also do it.

As mentioned above, the lateral distribution of the liquid takes place on the one hand within the laminar grid and on the other hand between the laminar grids of the filling. However, the degree of liquid distribution is not the same in the packings described so far. That is, the liquid is distributed better within the individual lattices than between the individual lattices. In order to achieve an optimal lateral distribution of liquid per grid, the filling can be configured such that the lamina of adjacent grids engage each other at the cut-out edges. Figure 14 shows
A notched edge 4 defined for such a filling
15 shows a cross-section of part of such a filling 41. FIG. This filling 4
The thin plate gratings of 1 are arranged in the same way as the thin plate gratings of the filling 11, the laminae of adjacent gratings being inclined in opposite directions towards the grating plane, and the centers of the intersections of the even numbered gratings are located at the intersections of the even numbered gratings. It is located on a line extending through the center of the mesh. In the case of packing 41, it is clear that the liquid flows from the edges of the lamellas of one lattice towards the lamellas of the adjacent lattice, and that, in addition to a good lateral distribution from one lattice to another, a high degree of turbulence also occurs. . Moreover, the packing 41 has the advantage of a very high packing density. Of course, also in the case of the filling 41, the crossing point can be constructed in such a way that the liquid phase flows across the crossing point, and for this purpose preferably the outer edges of the sheet metal strips have recesses 20, 21. These cutouts have been omitted from FIGS. 14 and 15 simply to simplify the drawing.

In the sheet metal grid 42 shown in FIG. 16, the laminae of each successive sheet metal strip in a zigzag pattern have alternating pairs of holes 43, in which case instead of or in addition to the pairs of holes 13 Lateral cutout 3 according to the diagram
It can also have 9'. The gas flow is thereby, in addition to being diverted, guided by the lamina at right angles to the flow direction 44 and, by means of the alternating holes 43, in the flow direction 44.
A passageway extending upward at an angle with respect to 4 is indicated by an arrow 45.
open to gas flow in the direction of

Furthermore, the sheet metal strips can have ridges or depressions extending at right angles to the longitudinal direction of the strip.
As an example thereof, FIG. 17 shows two meshes of a sheet metal grid made of corrugated plate with corrugated grooves 46 extending at right angles to the longitudinal direction of the strip. Packings consisting of such laminar grids are particularly advantageous for liquids that are not wet or completely wet, in which the transverse corrugated grooves prevent droplet or trickle formation and provide a uniform distribution on the lamina surface. Guaranteed distribution. Furthermore, the wave-shaped grooves 46 can also generate turbulence in the liquid phase between crossing points.

All the thin plate gratings mentioned so far are made from thin metal plates. However, the sheet metal grid can also be produced from plastic foil or a woven fabric strip.

[Brief explanation of the drawing]

FIG. 1 is an enlarged perspective view of a lattice network in a three-dimensional configuration of a known thin plate lattice; FIG. 2 is a side view of a portion of a packing consisting of stacked thin plate lattices; A cross-sectional view of the portion of the infill of FIG. 2 along the line of FIG. A side view of a part of another filling, FIG. 5 is a cross-sectional view of the filling part of FIG. 4 along the line - in FIG. 4, and FIG. FIGS. 7 and 8 are enlarged views showing the intersection points of one of the thin plate lattices of FIGS. 2 to 5, and FIGS. FIG. 9 is a schematic axial section of a plurality of packings inserted into the column one on top of the other, FIG. 10 is an enlarged plan view of one of the packings shown in FIG. 9, FIG. 11 is a view showing a modification of the intersection of FIG. 6, and FIG. 12 is a plan view of one of the packings shown in FIG. FIG. 13 is a diagram showing two meshes of a modification of the thin plate lattice in FIGS. 2 to 5; FIG. 14 is a diagram showing two meshes of another modification of the thin plate lattice of FIGS. FIG. 15 is an enlarged cross-sectional view of a part of the packing with interlocking sheet metal grids; FIG. , a diagram showing a thin plate grid in which the thin plate strips have holes alternately, FIG.
FIG. 6 shows two meshes of a modification of the thin plate lattice of FIGS. 13 to 17...Thin plate strip, 18...Intersecting point,
20, 21... Notch, 23... Liquid phase, a, b, c,
...thin plate lattice, A, B, C, ... lattice plane.

Claims (1)

[Scope of Claims] 1. Consisting of a plurality of thin plate gratings a, b, c, ..., each grating a, b, c, ... is bent in a substantially zigzag shape so that the grid faces A, B, C, ... In a packing for a mass exchange column, consisting of thin plate strips 13 to 17 which are inclined in the direction of flow and which are joined together at bending points 18 and form there the planar intersections of the grid, thin plate strips 13-1 extending to
7 has a flow guide section 20, 21; 3 at the intersection point 18.
8, and by means of this flow guide, the thin plate strip 17
Mass exchange column, characterized in that the flow direction of the liquid phases 22, 23 flowing down above is changed such that a part of the liquid phases 22, 23 is deflected via the intersection point 18 into the adjacent sheet metal strip 16 Filling for. 2. A thin plate strip consisting of a plurality of thin plate gratings a, b, c, ..., each of which is bent in a substantially zigzag shape and inclined with respect to the grating planes A, B, C, ... A mass exchange column packing consisting of thin plate strips 13 to 17 which are joined together at bending points 18 and form there the planar intersections of the grid, in which the thin plate strips 13 to 17 extend in the flow direction. 17
but at the crossing point 18, a cutout 20, which is provided in the outer region of the sheet metal strip on both sides of each crossing point 18,
The liquid phase 22 flowing down over the sheet metal strips 17 has flow guides 20, 21, 38 formed by ridges or depressions provided in the sheet metal strips 13-17 on both sides of the edges of 21 or at each crossing point 18. ,23
The edges or ridges or recesses of the notches 20, 21 are extended such that the direction of flow of the liquid phases 22, 23 is deflected through the intersection point 18 into the adjacent sheet strip 16. A packing for a mass exchange column, characterized in that: 3. The notches 20, 21 are longer than the width s of the thin plate strips in the direction in which the thin plate strips 13 to 17 extend in a zigzag manner and are deeper than half of this width s in the direction perpendicular to the thin plate strips. The filling according to claim 2, characterized by: 4 Hole 3 between the intersection points 18 of the thin plate strips 13 to 17
Packing according to claim 2 or 3, characterized in that it has 9, 43 and/or lateral cutouts 39'. 5 Each thin plate strip 13 to 1 successively following a zigzag pattern
Packing according to claim 4, characterized in that the 7 laminae are provided alternately with holes 43 and/or lateral notches. 6. Packing according to one of claims 2 to 5, characterized in that all the laminar grids a, b, c,... are stacked directly on top of each other. 7 First, third, fifth, etc. grids a, b, c,...
are inclined in the same direction to the grating planes A, B, C, ..., and the second, fourth, sixth, etc. grating planes b, d, etc.
The thin plate strips of f,... are arranged in opposite directions on the lattice planes A, B, C,
The filling according to claim 6, characterized in that it is inclined towards... 8. Claim 6, characterized in that the sheet metal gratings a, b, c, ... are stacked offset from one another in such a way that the sheet metal strips of each grating protrude into the meshes of both adjacent gratings. The filling according to item 1 or item 7. 9. Packing according to claim 8, characterized in that the sheet metal strips of adjacent grids engage one another at the cutout edges 40. 10 first, third, fifth etc. grids a, c, e,
The center of the intersection of ... is located on a common line perpendicular to the lattice planes A, B, C, ..., and the intersections of the second, fourth, sixth, etc. lattices b, d, f, ... The centers of the points are the first, third, fifth, etc. grids a, c,
extending through the center of the mesh of e,... and lattice plane A,
Claim 8, characterized in that it is located on a common line perpendicular to B, C,...
The filling according to item 9 or item 9. 11 Grids 36, 37 with different numbers of thin plate strips
are stacked on top of each other so that the packing cross-section 34 has a shape adapted to the circular tower cross-section 35 in stages and that the two outermost zigzag-shaped sheet metal strips of each grid are uninterrupted. Filler according to one of claims 6 to 10, characterized in that: 12. Claims 2 to 12, characterized in that the sheet metal strip is provided with ridges or depressions extending at right angles to the longitudinal direction of the strip, for example with corrugated grooves 46. Filling according to one of clauses 11. 13. According to one of the claims 2 to 12, characterized in that the width s of the sheet metal strips 13 to 17 is between 20 and 30 times the thickness t of this sheet metal strip. filling. 14 The thin plate strips 13 to 17 extending in the flow direction are
At the point of intersection 18 there are flow guides 20, 21; 38, which change the flow direction of the liquid phases 22, 23 flowing down on the thin plate strip 17, so that part of the liquid phases 22, 23 In order to produce a sheet metal grating in which the beams are deflected via crossing points 18 onto adjacent sheet metal strips 16, the strip 28 is cut into parallel strips 30, each of which is connected at a plurality of points 29, so that the adjacent strips 16 Cutting line portion 31 connecting pieces 30
have the same length and are offset relative to the adjacent cutting line section 31 by half this length, after which the strips 30 are pulled apart 33. Cutting line portion 31
A hole 32 is punched or drilled in both adjacent strips 30 in the center of the strip 30.
A method for producing a filling, characterized in that the filling is only then separated.